Washer dispensing device for roofing washer dispensing machine

ABSTRACT

A roofing washer dispensing machine includes a barrel with a nose located at a front end of the barrel and a board is connected to the barrel. A passage is defined in an upper surface of the board and a receiving recess is defined in the upper surface of the board and located beneath the nose. A tube for receiving roofing washers is connected to the barrel and located at an angle relative to the upper surface of the board. The angle is less than 90 degrees. A distance between a lower open end of the tube and the receiving recess is less than a diameter of a washer. A pushing device is connected to the board and has a pushing plate which is movably received in the passage.

FIELD OF THE INVENTION

[0001] The present invention relates to a roofing washer dispensing machine, and more particularly, to a roofing washer dispensing device wherein when the last one washer is sent to be nailed, the following washer is shifted by the movement of the last one washer.

BACKGROUND OF THE INVENTION

[0002] A conventional roofing washer dispensing machine is shown in FIGS. 7 and 8 and generally includes a barrel 100 of the machine and a tube 100 for receiving washers 102 is connected beside the barrel 100. A board 103 is connected to the barrel 100 and a passage 104 is defined in an upper surface of the board 103. The washers 102 are fed in the passage 104 one by one and are pushed toward the nose 105 of the machine 100 to be nailed. The tube 101 is parallel to the barrel 100 and the distance between the lower open end of the tube 101 and the nose 105 is “G” which is about two to three times of diameter of the washer 102. The distance “G” increase the possibility of jam of the washers 102. As shown in FIGS. 9 and 10, when the last one washer “A” is located in the passage 104 and pushed by a pushing member “D”, the following washer “B” is shifted forward slightly because of the friction between the two washers “A” and “B”. The shift of the washer “B” moves the washer “B” so that a “drop space” is formed and a part of the following washer “C” on the washer “B” could drop in the “drop space” and interrupts the movement of the pushing member “D”.

[0003] The present invention intends to provide a The present invention relates to a roofing washer dispensing device for a washer dispensing machine wherein the tube for receiving the washers is slightly inclined to the dispensing passage so that the last one washer contacts only at a limited area with the following washer which will not driven by the last one washer when the last one washer is sent to be nailed.

SUMMARY OF THE INVENTION

[0004] In accordance with one aspect of the present invention, there is provided a roofing washer dispensing machine which comprises a barrel with a nose located at a front end of the barrel and a board is connected to the barrel. A passage is defined in an upper surface of the board and a receiving recess is defined in the upper surface of the board and located beneath the nose. A tube for receiving roofing washers is connected to the barrel and located at an angle relative to the upper surface of the board. The angle is less than 90 degrees. A distance between a lower open end of the tube and the receiving recess is less than a diameter of a washer. A pushing device is connected to the board and has a pushing plate which is movably received in the passage.

[0005] The primary object of the present invention is to provide a roofing washer dispensing machine wherein the lower most washer contacts the following washer at only a limited area so that when the lower most washer is pushed, the following washer is not shifted by the friction.

[0006] The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007]FIG. 1 is a perspective view to show the roofing washer dispensing machine of the present invention;

[0008]FIG. 2 is a cross sectional view to show the roofing washer dispensing machine of the present invention;

[0009]FIG. 3 shows the tube has a pushing member and the pushing device of the present invention;

[0010]FIG. 4 shows the roofing washer dispensing machine of the present invention wherein the tube is empty;

[0011]FIG. 5 shows the lower most washer is received in the passage and contacts only a limited area with the following washer;

[0012]FIG. 6 shows the lower most washer is pushed and the distance between the lower open end of the tube and the receiving area is less than a diameter of a washer;

[0013]FIG. 7 is a perspective view to show a conventional roofing washer dispensing machine;

[0014]FIG. 8 is a cross sectional view to show the conventional roofing washer dispensing machine;

[0015]FIG. 9 shows the lower most washer of the conventional roofing washer dispensing machine is received in the passage and not yet pushed, and

[0016]FIG. 10 shows the lower most washer of the conventional roofing washer dispensing machine is pushed and the following washer is shifted forward by the friction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] Referring to FIGS. 1 to 4, the roofing washer dispensing machine of the present invention comprises a barrel 10 with a nose 11 located at a front end of the barrel 10. The barrel 10 is powered by pneumatic power which is not shown in the drawings and nails can be ejected from the nose 11. A board 20 is connected to the barrel 10 and a passage 21 is defined in an upper surface of the board 20. A receiving recess 23 is defined in the upper surface of the board 20 and located beneath the nose 11. A pushing device 40 is connected to the board 20 and has a pushing plate 22 which is movably received in the passage 21 and driven by a transverse plate 410 activated by a piston rod 411 of a cylinder 41.

[0018] A tube 31 is connected to the barrel 10 at a top end by a connection plate 33 and the roofing washers 50 are received in the tube 31. A pushing member 32 is biased by a spring band 320 so as to push the pile of washers 50 downward. The tube 31 is located at an angle “a” as shown in FIG. 2 relative to the upper surface of the board 20 and the angle “a” is less than 90 degrees. In other words, an angle is defined between an end surface of the lower open end of the tube 31 and the upper surface of the board 20. This special arrangement allows that when the lower most washer 50 drop in the passage 21 as shown in FIG. 5, the lower most washer 50 contacts the following washer 50 above at only a limited area. Therefore, when the pushing plate 22 is activated to push the lower most washer 50 toward the receiving area 23, the following washer will not shift by the friction as shown in FIG. 6 and improves the shortcoming of the conventional washer dispensing machine.

[0019] A distance “H” as shown in FIG. 6, between a lower open end of the tube 31 and the receiving recess 23 is less than a diameter of a washer 50. This ensures that each push of the pushing plate 22 feeds a washer to the receiving area 23.

[0020] While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

What is claimed is:
 1. A roofing washer dispensing machine comprising: a barrel with a nose located at a front end of the barrel, a board connected to the barrel and a passage defined in an upper surface of the board, a receiving recess defined in the upper surface of the board and located beneath the nose, a pushing device connected to the board and having a pushing plate which is movably received in the passage, and a tube connected to the barrel and located at an angle relative to the upper surface of the board and the angle is less than 90 degrees, a distance between a lower open end of the tube and the receiving recess being adapted to be less than a diameter of a washer.
 2. The roofing washer dispensing machine as claimed in claim 1, wherein an angle is defined between an end surface of the lower open end of the tube and the upper surface of the board. 